On the other hand, merra2 data can be accessed from nasas goddard earth sciences data and information services center ges disc. Merraas supports obs4mips observations for model intercomparison projects activities by reducing the time spent in. Information on merra 2 data files can be found in bosilovich et al. Nasa s earth observing system data and information system eosdis is a key core capability in nasa s earth science data systems program for archiving and distributing earth science data from multiple missions to users. The merra project focuses on historical climate analyses for a broad range of weather and climate time scales and places the nasa eos suite of observations in a climate context. Data access and visualization of model data at the nasa ges. Windographer data downloader this tool allows you to download longterm meteorological data for anywhere on the surface of the earth for free. This animation was created as part of a presentation for the nasa center for climate simulation nccs hyperwall display. After data is produced, the gmao examines the data files in several ways to test the quality of the data. Information on merra2 data files can be found in bosilovich et al.
Apr 10, 2017 the modernera retrospective analysis for research and applications merra dataset was released in 2009. If the users data are organized differently from these datasets, then new utilities may need to be written to handle their data. Gpm data downloads precipitation measurement missions. Nasa climate reanalysis datasets from merra 2, distributed at the goddard earth sciences data and information services center ges disc, have been used in broad research areas, such as climate variations, extreme weather, agriculture, renewable energy, and air quality, etc. Merra2 data are available at mdisc, managed by the nasa goddard earth sciences ges data and information services. Ssw url list downloading instructions subsetting data sets and downloading subsetted granules when you subset selected data sets, once the subset request is successfully completed for a selected data set, the subset results for that data set can be viewed by clicking on the that appears to the right of the data set description.
The nasa goddard earth sciences ges data and information services center disc is one of twelve nasa science mission directorate smd data centers that provide earth science data, information, and services to research scientists, applications scientists, applications users, and students. Time series for each 4 variables are available since 1 january 1979 up to 31 july 2014 35. We provide the support for the archive and distribution of the data for multiple satellite sensors, ground measurements, field campaigns and models. Please register with earthdata and login in order to gain full access. Merra downward shortwave flux corrected using quantilemapping and the statistics of srb beta distribution. Identical to the output columns received via the merra2 web interface.
If you are new to this application, please see the help page for a guide on how to use giovanni. These missions study rainfall and other types precipitation around the globe. The 3hourly cams reanalysis data can be accessed using the ecmwf web api. Terras five instruments produce 83 core data products which are distributed through the land processes distributed active archive center lpdaac, the atmospheric science data center asdc, ocean color web, level 1 and atmosphere archive and distribution system, and the national snow and ice data center nsidc. It was introduced to replace the original merra dataset because of the advances made in the assimilation system that enable assimilation of modern hyperspectral radiance and microwave observations, along with gpsradio occultation datasets. Merra2 is a nasa atmospheric reanalysis integrating satellite data assimilation and aims at. One thought on script to download nasamerra reanalysis in netcdf using wget qi october 17, 2015 at 8. The time period covered by this visualization is the months of may, june, and july of 1988 and 1993, two years with contrasting extreme weather events during the summer. You can also automatically retrieve merra2 dataset by using the curl command. It downloads a full 35year merra data set from windnavigator in about two minutes. The modernera retrospective analysis for research and applications, version 2 merra2 provides data beginning in.
As nasa weather and climate models simulate our planet on scales from hours to millennia, they produce datasets up to petabytes in size. The gpm combined radarradiometer algorithm performs two basic functions. Terras five instruments produce 83 core data products which are distributed through the land processes distributed active archive center lpdaac, the atmospheric science data center asdc, ocean color web, level 1 and atmosphere archive and distribution system, and the national snow and ice. Also, the merra2 budget equations are outlined there. It provides endtoend capabilities for managing nasas earth science data from various sourcessatellites, aircraft, field measurements, and various other programs. Other sites may also have the data ncar, for example and those methods would be different than those below. Contains a gisfriendly reformatted version of the tmpa data product aka trmm 3b42. At that point, they provisionally release it for download. This is due to the processing time of the data at nasa and the subsetprocessing at emd. Windographer data downloader free era5 and merra2 data.
The merraland data are available online through the mdisc, alongside merra data, as hourly averages of land surface fields. Modernera retrospective analysis for research and applications merra. Nasa s modern era retrospectiveanalysis for research and applicationsanalytic services merra as is a cyberinfrastructure resource for developing and evaluating the next generation of climate data analysis capabilities. Online visualization and value added services of merra2 data. Nasas modern era retrospectiveanalysis for research and applicationsanalytic services merraas is a cyberinfrastructure resource for developing and evaluating the next generation of climate data analysis capabilities. Time series for nasa merra wind speed and direction are now. It shows you the four nearest grid points on a map, letting you choose the one for which you wish to download data. The nasa climate reanalysis dataset from merra2 and the land data assimilation system ldas datasets, distributed at goddard earth sciences data. Both opacity and color are driven by the data value. The merra time period covers the modern era of remotely sensed data, from. Agmerra corrects to gridded temperature and precipitation, incorporates satellite precipitation, and replaces solar radiation with nasa gewex srb to cover the 19802010 period. Basically the way it works is that local data can be made accessible to remote locations by using servers.
The modernera retrospective analysis for research and applications merra dataset was released in 2009. We are not holding the data for any substantial length of time, before it can be accessed. Additionally, merra data files are stored in netcdf format, therefore the gtraj model executable is linked to the netcdf client library. Modernera retrospective analysis for research and applications reanalysis monthly precipitation flux. Questions regarding merra 2 science, modeling and data assimilation should be sent to. The global modeling and assimilation offices gmao modern eraretrospective analysis for research and analysis merra is a nasa reanalysis using a modern satellite data and the goddard earth observing system data assimilation system version 5 geos5. Worldwide validation of cams and merra2 reanalysis. Merra2 was initiated as an intermediate project between the aging merra data and the next generation of earth system analysis envisioned for the future coupled reanalysis.
Data collections nasa center for climate simulation. Studying diurnal variations of aerosols with nasa merra2. Nasa climate reanalysis datasets from merra2, distributed at the goddard earth sciences data and information services center ges disc, have been used in broad research areas, such as climate variations, extreme weather, agriculture, renewable energy, and air quality, etc. Identical to the output columns received via the merra 2 web interface. Data access and visualization of model data at the nasa. When the data have been processed at emd, then the following parameters are available from within the online data services within windpro. After downloading the appropriate panoply archive linked above, uncompress the archive file. The earthdata login provides a single mechanism for user registration and profile management for all eosdis system components daacs, tools, services. Script to download nasamerra reanalysis in netcdf using.
Merra 2 was initiated as an intermediate project between the aging merra data and the next generation of earth system analysis envisioned for the future coupled reanalysis. Opendap is a software framework that allows access of scientific data over the internet. Merra 2 data are available at mdisc, managed by the nasa goddard earth sciences ges data and information services center disc. You can also automatically retrieve merra 2 dataset by using the curl command. Jan, apr, jul, oct 2004 julyaugust 1987 jan, jul 2001 jul 2006 2 degree scout runs. The modern era retrospectiveanalysis for research and applications merra was undertaken by nasas global modeling and assimilation office with two primary objectives. Merra data is commonly available within windpro with a timelag of 12 months.
Merra data, used by gtraj, is stored on a nasa server. The modernera retrospective analysis for research and applications, version 2 merra2 provides data beginning in 1980. Merra data span the period 1979 through february 2016 and were produced on a 0. Script to download nasamerra reanalysis in netcdf using wget. The gisreformatted version is a 2byte tiff image plus an esri worldfile text metadata file. Merra2 covers land surface diagnostics for the period 1980present at 0. Jun 30, 2017 the nasa climate reanalysis dataset from merra 2 and the land data assimilation system ldas datasets, distributed at goddard earth sciences data and information services center ges disc.
You may also visit the nasa gesdisc channel for a quick look at giovanni features. It currently supports the download of era5, merra and merra 2 data, and in the future it may incorporate additional data sources. Data access and visualization of model data at the. The merra time period covers the modern era of remotely sensed data, from 1979 through the present. This directory contains the agmip climate forcing dataset based on the nasa modernera. Questions regarding merra2 science, modeling and data assimilation should be sent to. Jun 24, 2010 the modern era retrospectiveanalysis for research and applications was developed to support nasa s earth science objectives, by applying the stateoftheart gmao data assimilation system that includes many modern observing systems such as eos in a climate framework. Online visualization and value added services of merra2.
Also, the merra 2 budget equations are outlined there. A web interface for variable selection and temporalspatial subsetting providing output in a. It is based on a version of the geos5 atmospheric data assimilation system that was frozen in 2008. It currently supports the download of era5, merra and merra2 data, and in the future it may incorporate additional data sources. The modernera retrospective analysis for research and applications, version 2 merra2 web service, available worldwide, delivers time series of temperature at 2 m, relative humidity at 2 m, pressure at 2 m, wind speed and direction at 10 m, rainfall, snowfall and snow depth time steps range from 1 min up to 1 month original data are hourly. Atmospheric assimilation focuses on the historical analyses of the hydrological cycle on a broad range of weather and climate time scales.
A new dataset from nasas carbon monitoring system provides annual maps of live aboveground tree biomass mgha for pinyonjuniper forests across the great basin of the western usa for the years 20002016 at a spatial resolution of 30 meters. When we are confident that the data files are within the tolerance of the uncertainty we have seen in our validation experiments, we release it to the mdisc. Data sources precipitation measurement missions nasa. What is the best data center to download world climatic data. This tool allows you to download longterm meteorological data for anywhere on the surface of the earth for free. Data is divided into directories by time scales and type. The geos2wrf software has been used to process merra and merra2 files, as well as the daily geos5. Nasas climate data services cds provide a central location for publishing and accessing large, complex climate model data to benefit the climate science community as well as the broader public.
Merra data are available at the modeling and assimilation data and information services center mdisc, managed by the nasa goddard earth sciences ges data and information services center disc. The earth observing system data and information system is a key core capability in nasas earth science data systems program. These include aqua airs, aura hirdlsmlsomi, sorce, toms, tovs, trmm, uars, ldas and merramerra2. This application allows you to visualize selected geophysical parameters. When the data have been processed at emd, then the following parameters are available. Merra, or the modern era retrospectiveanalysis for research and application, is a nasa reanalysis for the satellite era 30 years 1979current using the goddard earth observing system data. Climate data services nasa center for climate simulation. Merra wind speed and direction dataset has 1 hour time step. In agreement with the recommendations of nasa available on their platform, please use the following description to cite the. This visualization shows the relative humidity dataset produced by merra, up to a geopotential height of 20 km. This directory contains the agmip climate forcing dataset based on the nasa modernera restrospective analysis for research and applications merra. The special focus of the atmospheric assimilation is the hydrological cycle. Merra2 is intended to replace the original merra product, and reflects recent advances in atmospheric modeling and data assimilation. Time series for nasa merra wind speed and direction are.
The modernera retrospective analysis for research and applications, version 2 merra 2 provides data beginning in 1980. Merra2 is a nasa atmospheric reanalysis integrating satellite data assimilation and aims at historical climate analyses. The official website for nasa precipitation measurement missions. Webbased reanalysis intercomparison tools writ allows users to quick analyze and intercompare multiple contemporary reanalyses data. The version 2 of merra was introduced in 2016 to replace the original merra dataset because of the advances made in the assimilation system. Jun 04, 2012 merra2wrf is customized to process hdf4, hdfeos2, and netcdf files for merra or merra2 from the nasa ges disc web site. Mar 23, 2010 basically the way it works is that local data can be made accessible to remote locations by using servers.
Agmerra climate forcing dataset for agricultural modeling nasa. Trmm data download and analysis using arcmap duration. However, if the format of the data on ges disc changes in the future, then merra2wrf may be retired in. Tmpa is a 3hourly average global grid of surface rainfall estimates from a collection of microwave radiometers.
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